The 8-day Mystery of the Rainbow trip explores a maze of small canyons collectively named Mystery Canyon by the first explorers of this region because finding a route into them was so difficult. Discovering a backpack-able route through these canyons required several exploratory trips over a 4-5 year time period. The 2014 trip, April 5-12, was enjoyed by 11 participants. The 2015 trip will be April 4-11 and announced on the Sierra Club National Outings website in November.